03-23-2010, 11:11 PM
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I know nothing about breeding tetras but i do know they are egg scatterers.
If you don't mind your tank has some stocking issues let me specify:
Your bleeding heart tetras, white tetra(im guessing its a dyed black widow), your corries and your danios are all schooling fish and should be in groups of at least 6, prefferbly 8. If they are not kept in schools they get stressed and easily become sick and don't live very long. You can easily get those fish to their proper stocking levels in a 30 gallon with no problems.
Hope this helps